
RC, and pedigree are both owned by masterfoods (owned by Mars) I think JWB is related in some way but can't remember if they are also owned by Masterfood or another company owned by Mars.
Either way the companies are still competitors and do not work together!!!!!
EDIT: Pedigree is masterfoods, RC and JWB are Crown Pet foods :) and Mars, I think, Have a large share in crown pet foods.
Dear me this is getting complacated!!!! :D